Seamless 254SMO/31254 |UNS S31254|1.4547 Stainless Steel Tube
We leverage decades of metallurgical expertise to provide export-grade seamless pipes in a wide range of schedules and customized dimensions tailored to project-specific requirements. Backed by full traceability (MTRs) and international certifications, Tengqi ensures the reliability of every order through stringent Non-Destructive Testing (NDT) and Third-Party Inspection (TPI) approvals. Discover the superior performance of our 6-moly stainless steel solutions. Request a quote today to benefit from our factory-direct pricing and comprehensive technical support.
PREN = %Cr + 3.3 x%Mo + 16x%N ≥ 42.5
Seamless254SMO/31254 Stainless Steel Tube (254SMO / UNS S31254 / W.Nr. 1.4547) is a 6% Mo super-austenitic grade with a PREN above 42 for seawater and chloride service. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.
Product Specifications
- ASTM A213 / ASME SA213 — Seamless
- ASTM A269 / A269M — Seamless & Welded
- ASTM A270 / A270M — Sanitary Tubing
- ASTM A1016 / A1016M — General Requirements
- EN 10216-5 — Seamless Pressure Tubing
- Finishing: solution annealed, pickled & polished; bright annealed available on request
Size Range
| Outside Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6.35 mm – 257 mm (1/4"– 10.1") | 0.5 mm – 12.7 mm | ≤ 22 m |
Chemical Composition
254SMO (UNS S31254) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| S31254 | ≤ 0.020 | ≤ 1.00 | ≤ 0.030 | ≤ 0.010 | ≤ 0.80 | 19.5 – 20.5 | 17.5 – 18.5 | 6.0 – 6.5 | 0.18 – 0.25 | 0.50 – 1.00 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 675 MPa |
| Yield Strength (0.2% offset) | ≥ 310 MPa |
| Elongation in 2 in. / 50 mm | ≥ 35% |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm3 |
| Thermal Conductivity | 14.0 W/m·K |
| Specific Heat Capacity | 500 J/kg·K |
| Elastic Modulus | 195 GPa |
| Magnetic Properties | Non-magnetic (slightly magnetic when cold worked) |
| PREN (Pitting Resistance Equivalent) | ≥ 42.0 |
Industry Applications
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CONTACT US
Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province，355400，China
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